$1$ def foo$($seq$)$:

$2$ pos $=$ bar$($seq$)$

$3$ a $=$ seq$[$:pos$]$

$4$ b $=$ seq$[$pos$+1$:$]$

$5$ return a$+$b

$6$

$7$ def bar$($sub$)$:

$8$ return sub$[0]$

$9$

$10$ p $=[2,0,-1,4]$

$11$ p $=$ foo$($p$)$

$12$ print$($p$)$

Answer the questions dasuming the entire code has been executed:

Fill in the value$($s$)$ for $($a$)$:

Fill in the value$($s$)$ for $($b$)$:

Fill in the value$($s$)$ for $($c$)$:

Fill in the value$($s$)$ for $($d$)$:

What is the value of

when line $4$ is executed:

What will be printed to the terminal as a result of executing line $12?$: